This project represents a collaborative multi-agency effort to support decision-making for the A.T. by providing a coherent framework for data integration, monitoring, reporting and forecasting. The A.T.-DSS integrates NASA multi-platform sensor data, NASA Terrestrial Observation and Prediction System (TOPS) models, and in situ measurements from A.T. MEGA-Transect partners to address the management issues of the A.T. environment. The A.T.-DSS focuses on primary vital signs of phenology and climate, forest health and landscape dynamics, among others.